I'd be burrowing you'd be burrowing he'd be burrowing we'd be burrowing you'd be burrowing they'd be burrowing
Perfect
I should've burrowed you should've burrowed he should've burrowed we should've burrowed you should've burrowed they should've burrowed
V-ing perfect
I should've been burrowing you should've been burrowing he should've been burrowing we should've been burrowing you should've been burrowing they should've been burrowing
Negation
Simple form
I shouldn't burrow you shouldn't burrow he shouldn't burrow we shouldn't burrow you shouldn't burrow they shouldn't burrow
V-ing form
I shouldn't be burrowing you shouldn't be burrowing he shouldn't be burrowing we shouldn't be burrowing you shouldn't be burrowing they shouldn't be burrowing
Perfect
I shouldn't have burrowed you shouldn't have burrowed he shouldn't have burrowed we shouldn't have burrowed you shouldn't have burrowed they shouldn't have burrowed
V-ing perfect
I shouldn't have been burrowing you shouldn't have been burrowing he shouldn't have been burrowing we shouldn't have been burrowing you shouldn't have been burrowing they shouldn't have been burrowing
Interrogative form
Simple form
should I burrow? should you burrow? should he burrow? should we burrow? should you burrow? should they burrow?
V-ing form
should I be burrowing? should you be burrowing? should he be burrowing? should we be burrowing? should you be burrowing? should they be burrowing?
Perfect
should I have burrowed? should you have burrowed? should he have burrowed? should we have burrowed? should you have burrowed? should they have burrowed?
V-ing perfect
should I have been burrowing? should you have been burrowing? should he have been burrowing? should we have been burrowing? should you have been burrowing? should they have been burrowing?
Interro-negative form
Simple form
shouldn't I burrow? shouldn't you burrow? shouldn't he burrow? shouldn't we burrow? shouldn't you burrow? shouldn't they burrow?
V-ing form
shouldn't I be burrowing? shouldn't you be burrowing? shouldn't he be burrowing? shouldn't we be burrowing? shouldn't you be burrowing? shouldn't they be burrowing?
Perfect
shouldn't I have burrowed? shouldn't you have burrowed? shouldn't he have burrowed? shouldn't we have burrowed? shouldn't you have burrowed? shouldn't they have burrowed?
V-ing perfect
shouldn't I have been burrowing? shouldn't you have been burrowing? shouldn't he have been burrowing? shouldn't we have been burrowing? shouldn't you have been burrowing? shouldn't they have been burrowing?